Lithium Manganese Dioxide (Li-MnO2) For Digital Thermometer, Glucose Monitor, Laser Pointer Long-lasting power for your high-tech, precision devices and works wherever the job takes you - in the field and on-the-go Delivers the reliable, leakproof and lightweight power that professionals demand Lithium excels in extreme temperatures (-40 to 140 degrees F) - ideal for outdoor use 33% lighter than traditional alkaline batteries so perfect for portable devices, especially cordless tools Holds their power with up to 10 years of shelf life